Fig. 3
From: Muscles adaptation to aging and training: architectural changes – a randomised trial
Regression equations obtained from the muscles of the triceps surae in young (a, c, e) and old (b, d, f) groups. Values are relative to maximum anatomical cross sectional area (ACSA) and muscle length. 0% of relative length corresponds to proximal end (knee proximity) and 100% corresponds to distal end (ankle proximity). a,b: Medial gastrocnemius (MG), c,d: Lateral gastrocnemius (LG) and e,f: Soleus (Sol)